What number do you get when you decrease the ones digit of 2019 by 2?

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Askateboard ramp is in the shape of a right triangle what is the height of the ramp